Preparatory worsted spinning



Sept. 7 1926'.

1,598,952 G. MVJ. ANSORG PREARATORY WORSTED SPINNING Filed Sept. 29, 1925 m/ #aus Patemea sept. 7; 1926.

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xApplicationiled September `29, 1925, .Serial No. 59,334, and in Germany December 12, 1924. l'

Y ,fIliis-` invention' `relates-to .class lof 4'worsted preparing machinery which is'fspe-` yciallyA designedto-vproduce `vthe .roving re- .;quired for? beingV spunf intogworsted-yarn. The particular [object of this invention ls-to utilize a single set'offallersorgillsofade- Aquate` construction .in a -mo'st advantageous manner, 'soy `asto replace `the;porcup1ne or rotary faller hitherto .fused in the intermediate and finisherpassages lof ,worsted- Preparation sets.I auf., l T

x The gillv bars. or fallers',`;in. constituting the plain bed, of gills.. of different Vwidth .and depth, are universally recognized fandused as an Vappropriate #means for;L drawing medium and-along. stapledn fibrous materials. Y `Two methods of gillingarefgenerally-in use,5either,by"the vsingle vor bythe .double set of .fallers 'driven by square Bthreaded re- -Volving screws, ...commonlyztermed 1..' gill screws, Thef singlecgill box with one row of. gillsl-is operated so as toensure ai' rectilinear insertion of the faller pins `i'nto'the bulk of the fibres,fwhilst. the intersectinggill box fitted with adoublerow of kgills works in such away thatthe pins i pierce the sliver from above and fromV below, thus preventing the fibres fromescaping from the needle field, i and constitutinglfpositve guiding means whereby the fibres are thoroughly guided andy presented tothe drawing rollers, which, owing to their revolving at a higher rate" of surface speed-than the preceding feed rollers, accomplish the drafting process required for the attenuation of the sliver.

The main object of any drafting offibrous material is known to be the obviation of thick and thin places in the sliver by a certain number of doublings and of the subsequent drawing operation, on the other hand, however, the progressive regularization and attenuation of the sliver during the succeeding preparing passages, that is to reduce the number of fibres to the cross section and to parallelize the fibres until finally a roving is obtained having a sufficient grade of attenuation'and a suitable hank weight, so as to be passed to the ne spinning frame. Y For drawing thick woolen slivers before combing and in the first drawing passages of worsted mills, withwhich in the present case we are principally concerned, the double row of gills, as applied to intersecting gill boxes, has entirely superseded the 1,

singley row ofv gills as wellas the porcupine or rotary gill. Hence it is essential that the desired jregularization of the sliver be achieved in these early stages of worsted ,-preparation.. s 2 y y [In'the intermediate and finisher passages, succeeding theintersecting gill boxes with a L.double row of gills, i.-` e. coarsevorheavy drawings, reducers, intermediates, first and second finishers, where especially the attenuration of the sliver and its .transformation` `mills spinning on the iAlsatian or French *systemof drawing, Lthe faller was exclusively used` up to` the present for drawing slivers which` are stillof a large` cross section. f l

Practical experience nowdleads to the intuition vthatthe double set of fallers, owing uto its difficult application, is no klonger of use for drawing already reduced -slivers in the intermediate and finisher passages of preparation, and that in this caseA the single .set offallers isV far' better adapted for this purpose. IThe' singleset yof fallers ensures not only a likewise positive conduction ofthe lfibres .in these reducedslivers, vbut also a more effective drawing operation in comparison with that of the porcupine, which presents less convenience in guiding the. libres in the same perfect manner required for equal drafting than the single set of fallers constituting the plain bed or gills. This consideration might be quite suhcient to show that the single set of fallers in an appropriate. design might be yapplied to advantage for substituting the porcupines hitherto used in the intermediate and finisher passages of worsted prepartion, so that in course of time these can be entirely dispensed with. This is the fundamental idea and basic principle of the present invention.

The attenuation of the sliver 'in the various worsted preparing operations onthe Alsatian or French drawing principle is performed in conjunction either wtih endless rubbing leathers having imparted thereto both a forward and a reciprocating rubbing motion, or with a revolving funnel for putting a false twist into the sliver, so as to compensate for the loosening of the internal structure of the sliver after drafting and to restore to the same the required tensile strength for treatment in the following passages.

The repeated process of re-strengthening the sliver must be also maintained when working` withY the single set of fallers in the intermediate and finisher passages of the worsted preparation,

This improved drafting method offers the possibility of realizing the application of much higer drafts than the porcupine or rotary drawing, whilst the uniformity of the roving` remains unaffected and might be even improved. A further advantage is the increased working speed which means a considerable increase in production. In consequence thereof the application of higher drafting also affords a reduction in the number of thesvarious preparing passages, this is in contradistinction to the porcupine system of drawing, which allows no such economy at all. The entire suppression of a plurality of passages contributes greatly to a remarkable economy in the operating costs of a worsted mill.

The scheine of the new drafting system with a single set ofzfallers operated, for instance, in conjunction with rubbing aprons and revolving funnel, is illustrated in the accompanying diagram; and referring thereto:

a, b indicate the slowly rotating pair of feed rollers vfor feeding the sliver on to the machine; c, d indicate the pair of sliding rollers to be positioned in front of theV single set c of fallers (bed of gills) f, g the pair of drawing rollers rotating with increased surface speed, and 71 i the two endless rubbing leathers having a rotary as well as a reciprocating lateral movement c is the revolving funnel which may be either single or double, for final delivery of the attenuated and rcstrengthened sliver to the drawing-off or bobbin roller, by means of which it is wound on to a bobbing and Z is the drawing-off roller rimparting vmotion to the bobbin m.

Vith regard to the general construction `of the drawing box with rubbers and a single row of gills for the intermediate and finisher worsted preparing passages, it should be observed that the heads or sections are arranged in an uninterrupted succession in the saine manner as with the usual type of porcupine drawing boxes, whereas the intersecting gill box working with 2 sets of fallers can be only made with independent or isolated heads;

Further provision can be made in the arrangement of the heads of the rubber drawing box with a single row of gills that 2 to 4. and even more slivers can be separately passed through the heads according to gradually increasing attenuation in the various passages of worsted preparation.

Claims:

l. In a drawing box having means for effecting rubbing motion for preparatory worsted spinning, a set of fallers constituting one. single bed of gills for the interme- GEORG MARTIN JULIUS ANSORG. 

